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I'm looking for some guide for Microsoft Visual Studio 2010, but I can't find nothing useful.
I'm coding in c++.
What I need is to create a button (in the dialog box) that, when I click on it, gives me the possibility to choose a file from my pc.
After that, I only need to charge in memory (like in a string variable nameFile) the name of this file.
Do anyone know how to do this operation?
And second problem, do you guys know any youtube guide or similar to customize the interface??
Like to put one picture on the background of the application, or change button style etc.
I used Eclipse before, coding in Java and It was totally different.
Thank you all!!
Here is an MFC tutorial for adding a button to a dialog and what has to be done to "wire it up" so that clicking the button invokes an event handler for the BN_CLICKED event.
Inside the BN_CLICKED event handler (that is, the function that is called when you click the button), you'll want to launch the dialog that lets you selecte the file. #Jongware suggested this link, which has a couple of approaches.
Once the file has been selected and the dialog disappears, you'll have access to the string containing the selected file. How you do this will depend on which approach you take in the preceding step. Once you have the string, you can use the appropriate File Management functions to slice-and-dice the file name as necessary.
That's far short of the actual code you'll need to write, I know, but it should give you enough of a start to get going. HTH.
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I was reading an example on QT on c++ gui - notepad application
and i encountered the word "wizard" many times .. i can't understand what it does mean.
for example i found these statements :
The Qt Widgets Application wizard creates a project that contains a main source file and a set of files that specify a user interface (Notepad widget)
-The wizard generates the following code in the main.cpp file
This is the object for which the wizard created the class and the UI file.
The wizard generates a user interface definition in XML format: notepad.ui.
I searched on the internet and i found that it means the detailed steps to install a programs .. but this definition doesn't fit the subject of the link.
Any one knows the exact meaning ?
A "wizard" is a dialog box with "next" and "previous" buttons.
Consider installing a program for example:
You open the installer.
The installer tells you what you're installing and tells you to click Next.
You click Next.
The installer asks you which folder you want to install the program in.
You click Next.
The installer asks you which parts of the program you want to install.
You click Next.
The installer installs the program.
The installer says it's done.
You click Finish.
The installer closes.
This "question, next, question, next, question, next, ..." UI is called a "wizard".
It's not a wizard because it installs a program; it's a wizard because of the "next" button.
Consider creating a new project:
You open the "New Project" window
The computer asks you which type of project you want to create.
You click Next.
The computer asks you what the project should be called.
You click Next.
The computer asks you which compiler you want to use to build the project.
You click Finish
This is also a wizard.
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I started making GUI Apps with Qt 5.7 around 2 weeks ago.
Until today I have made a BlackJack game, a basic mini encryption program and 1-2 more programs. Now, I could find any help on how to make an application that actually acts like a Setup Wizard- by that I mean, for example by clicking on next, a label or any elements are gone and new one appera like a progress bar and below the contents that are copied. How is that actually done?
Is it something like on_pushButton_clicked() and afterwards the usless elements are hidden like ui->pushButton->hide(); and others show up, or is it literally made by practically "rebuilding" the window with other elements and functionalities?
Edit: Mike's comment revealing the existence of QWizard and QWizardPage makes my answer quite redundant, unless you have requirements exceeding the abilities of those widgets - or simply want to implement everything yourself - which the OP has replied that they do want to try. For everyone else, you might only need to read on if you need - or want! - to do all the heavy lifting.
One way to do that is, as you pondered, to destroy the old contents (child widgets) of the window after each page, then repopulate it for the next.
But that's far from ideal IMO: it's wasteful, and it would require you to repeatedly destroy/rebuild things, with all the jumping around that entails, to support Back/Next/Jump to Page # buttons and all routes between different pages. That's more programming and more use of resources to keep unnecessarily tearing down and rebuilding stuff.
Your other idea about hiding is better, and I know exactly the container for this job! With this, you can build everything in advance and won't need to repeatedly remove/add children to change pages (as you would e.g. if you used a QGridLayout).
Give your window a single child of the container class QStackedWidget. This container takes multiple child widgets but shows only one at a time. So:
Add to it a child container for each page of your wizard.
Populate each child with required widgets for that page.
Connect buttons, etc in each page to signals to do required actions...
...especially your Back/Next (and Jump, or whatever) buttons. Set these up so that they change the active child of the QStackedWidget by using the Slot setCurrentIndex().
This way, you build the entire stack of all pages, ready to go, before ever showing the window. Then, when ready, you just show it, and everything is present and ready. Your signals, all properly connected, will take care of everything else: changing between pages, validating input, revealing labels or opening dialogs warning about missing information, etc.
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As some suggested, I'm trying to minimize the question and get out of the web. That web example was not exactly what I wanted. I simply wanted to make a macro. Like if a condition is true open date settings and change the date to December 2000. If false, open time settings. How can I program to do this? Do I need to execute some commands in command prompt window to do it? If yes what are they? Actually, I want to make a macro that will do a lot of work in just on click.
as far as I know, eveything we do in computer or windows just executes a series of commands depending on the input of mouse and keyboard. So, I want to know if it is possible to know what commands are being executed in background. Actually, I want to make a macro in my program. As for example, a program that will go to google, search for a word and download the first imahe that comes from the search. If, it is possible to know then how.
[I could have searched in google. but I just couldn't guess what keywords to use in the search. so, I posted here. I am sorry if it has already been dicussed]
These click-related commands are really related to the GUI system. These 'commands' figure out what type of click, where on the screen it occurred, etc. After all that, some function to do the work will start executing, which is completely unique to the program, rather than the GUI.
Program that leverage other programs do not got through the GUI, and therefore can skip all of that. They instead use API's to directly access the functionality that is accessed by the sequence of events triggered by a mouse click.
The web is not my area of focus, so I do not have a reliable suggestion for how you would accomplish this, but the takeaway is this: Don't strive to understand the underlying technology by tracing mouse clicks. The GUI is an abstraction from what is really going on "under the hood," and is rarely an effective segue into the underlying mechanisms of a program.
Searching for "image search API" would be a good place to start.
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What is the your most useful and productive keyboard shortcut in Qt Creator?
Following the trend of great questions asked about Eclipse CDT, vim, Intellij IDEA.
Comment/uncomment lines (select text and press). With this shortcut you can simply comment very large piece of code and uncomment it in future:
Ctrl + /
Autocomplete:
Ctrl + Space
History of clipboard. You get popup menu with all text which you pasted in Qt Creator and if you choose something and press Enter you paste this formatted text into your code
Ctrl + Shift + V
F2 aka "Follow Symbol Under Cursor"
(You can also use Ctrl + Left Mouse Button for this.)
Let me explain. In visual studio to obtain the same you have F12 (Go to definition) but this one open the search result and need you to select the possible matches. The difference between instant result and a possible two seconds or more to get what you want (especially with common names like open)
F4 aka "Switch\Header Source"
In several other visual text editors for C++ (including Visual) you have to manually locate the header corresponding to the current source or vice-versa. But it's effectiveness greatly depend on whether or not you are using SCU for your classes.
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I'm extremely new to visual c++, I thought that having the debugger be able to debug a button click would be as simple as vb/c# .net but it's clearly not :) I'm having difficulty finding anything online explaining how you debug visual C++ button clicks. Since there's no events like in VB, how does one go about doing this?
Regardless of the framework in question, or really the language in question, when debugging an application using Visual Studio you simply place a breakpoint on the line in question.
You can place a breakpoint by hitting F9 on the line you would like to stop at or by right clicking on the line and going to Breakpoint > Insert Breakpoint.
That being said, if you have no code to "handle" (in the general sense of the term, as I'm not certain what framework you're using) a button click, then you will have no code to insert a breakpoint into.